A white-flowered plant is crossed with a red-flowered plant, and all of the offspring have pink flowers. This could be an example of:
What will be an ideal response?
Both the second and third choices are correct.
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Which cyclin(s) is/are required to pass the G1 restriction point in animal cells?
a. Cyclin A b. Cyclin A and Cyclin B c. Cyclin D d. Cyclin D and Cyclin E
Consider a culture medium on which only gram-positive organisms such as Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the pH as a result and changing the color of a pH indicator chemical. This type of medium would be referred to as a(n)
A) selective medium. B) differential medium. C) enrichment culture. D) selective and differential medium. E) differential and enrichment culture.
You go to the movies with a friend, and he refuses to share your popcorn. He says that he heard that movie theatre popcorn is triploid. What is the most likely explanation for this?
A. All popcorn is triploid, because the starchy part of the kernel is triploid endosperm tissue. B. The buttery topping on movie theatre popcorn causes chromosomal abnormalities. C. Most corn is genetically modified by large agricultural companies. D. Popcorn is made from a different species of maize than regular corn.
The cancer-causing forms of the Ras protein are involved in which of the following processes?
A) relaying a signal from a growth factor receptor B) DNA replication C) DNA repair D) cell-cell adhesion E) cell division